This recipe is from Shirley McNevich's Mom's Best Recipes Vol 2. Published here with her permission.
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(by Shirley McNevich)
1 box Duncan Hines chocolate cake mix
2 lbs. of sifted Domino's powdered sugar
1 tsp. vanilla
2 TBSP milk
3 TBSP Crisco
1/2 cup Jif creamy peanut butter
6 regular size Reese's Peanut Butter cups (chopped into small pieces)
Prepare cake as directed on box using a 9 x 13 x 2 cake pan. Cool completely. Icing--in a mixer, beat sugar, vanilla, Crisco, milk and peanut butter until smooth and creamy--if frosting is too thick, add more milk until you like the consistency. Frost the cake, and then sprinkle with the chopped Reese's Peanut Butter cups.
 
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